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Home >> Toyota >> 1993 >> Paseo Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Coolant Temperature Switch (A/T)

Coolant Temperature Switch (A/T)

When coolant temperature exceeds a specified value, coolant temperature switch contacts close, and an input signal is delivered to Engine Control Module (ECM) at TWS terminal. The ECM uses input signal to operate Vacuum Switching Valve (VSV) for fuel pressure control system.